Poppet-valve.



C. D. COMPTON.

POPPET VALVE.

APPLICATION FILED AUG.I8,1916.

Patented Jan. 23,1917.

7 Ill/VE/VTQI? flaw/20 D. (Zfifi'fl)? BY and coasting means on CLARENCE D. COMZPTON, OF, NEW YORK, N. Y.

BUFFET-VALVE.

Specification of Letters Patent.

Patented Jan. 23, 1211?.

- Application filed August 18 1916. Serial No. 115,727.

To all whom it may concern.

Be it known that I, CLARENCE D. COMP- TON, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Poppet-Valve, of which the following is a full, clear, and exact description.

My invention relates to a spring-pressed poppet valve, as for example, the poppet valves employed on internal combustion engines.

Particularly, the invention relates to a valve of the indicated class having 'means whereby a turning movement will be imparted to the valve relatively to its seat in the normal operation of the valve, in order to effect a self-grinding action, bya varying presentation of the valve to its seat.

An object of the invention is to provide means to relieve the valve of the spring pressure when the valve is open, thereby leaving the valve more free to turn. This object is attained by effecting an indirect pressure of the spring on the valve stem and causing the operation of the valve-actuating means to first relieve the spring pressure on the stem before the stem is engaged and actuated. V

A further object of the invention is to provide means whereby to give a turning movement to the valve when relieved of the spring pressure. This object is attained in the preferred form of the invention by a spring-supported weight loose on the stem the stem and weight to impart a slight turning movement to the weight that its momentum will tend gradually to turn the stem and valve.

The invention will be more particularly explained in the specific description following.

Reference is to be had to the accompanying drawings forming a part of this specification in which similar reference characters indicate corresponding parts in all the views. 2

Figure 1 is a vertical section oi a poppet valve embodying my invention, showing the same applied; Fig. 2 is a side elevation, the

. valve easing being in section on the line 2-2, Fig. i, the valve itself being shown at right angles to the position of Fig. 1; Fig.

3 is a detail horizontal section on the line 3-3, Fig. 2,

T have shown my invention applied to the poppet valve of an internal combustion engine, the numeral 10 indicating the valve of the usual form having a. stem 11 and movable to and from the valve seat 12 in the engine 13. The numeral'l i indicates the valve casing, and 15, the usual rocker arm for actuating the valve by an axial movement of the valve stem.

The spring 16 surrounding the valve stem bears at its lower end against the top of the usual partition 17. Instead of the spring abutting at its upper end directly against the valve stem, I provide an element 18 loosely slidable on the stem and receiving the pressure of the spring Preferably, said element is cup-shape presenting an annular flange adapted to receive the contact of the cap 19 which is engaged by the rocker arm 15 The arrangement is such that as the cap 19 1S moved on the stem in the opening movement of the valve, said cap will contact with.

the flange of-the cup 18, thereby depressing the same against the tension of the spring 16.

I provide on the stem means to be engaged by the cap. ,l9 after the cup 18 hasbeen'displaced and the spring depressed. Advan tageously, the means consists of a washer 20 on thestem and made rigid therewith by a the washer 20 and upon closing pressure of the spring against the cup 18, said cup contacts with the washer 20, thereby closing the valve. Upon the opening of the valve the cap when depressed will first displace the cup 18 thereby relieving the washer 20 and the stem of spring pressure, the continued movement of the cap serving to engage the washer 20 for depressing the stem and openingthe valve. i

It will thus be seen that in the open position oi" the valve, the stem is entirely relieved of the spring pressure and is therefore more :ireeto turn due to the vibration imparted to the valve in the sudden opening thereof.

in order not to depend on the self-turning ot thevalve, T provide means acting, when the valve is open and thus free from the spring pressure, to turn the valve relatively to the seat. In the illustrated example, the means to impart a turning movement to the valve includes a weight 22 ioose on the stem transverse pin 21. The cup 18 accommodates 8.5

through, and a rigid pin 25. on the stem extends into said slot. In operation as the the valve 10 so that always there Will be a Varying relation'produced between the valve and its seat. p

Having thus described my invention I claim as new, and desire to secure by Letters Patent:

1. The combination with a'spring-pressed poppet valve and its seat, of actuating means for the valve initially movable to free the valve from the pressure ofthe spring, the continued movement of said means serving to actuate the valve after being freed from the spring pressure. a

2. The comb'nation with a poppet valve and its seat, of a spring closing the valve, an element movable relatively to the stem against which the spring abuts, a member on the stem to be engaged by said element, and

of the pressure of the spring and impart an opening movement to the valveafter being freed from the spring pressure.

4. The combination With a poppet val e and its seat, of actuating means for the valve, a Weight loose on the valve stem, and

coacting means on the Weight and stem to impart a turning movement to the Weight.

5. The combination with a poppet valve its seat and spring means acting on the valve stem and tending to close the valve, of actuating means. movable to relieve the spring pressure on the stem in opening the valve, a spring-supported Weight loose on the stem, and co-acting means on the stem and weight to impart a turning movement to the Weight upon an opening movement of the stem.

CLARENCE D. COMPTON. WVitnesses I GEORGE GLAss, PATRICK SHEEHY. 

